Adjustable chuck or spider.



E'. J. HoYT. ADJUSTABLE CHUCK 0R SPIDER. APPLICATION FILED IIAB.16, 1911.

1,008,544. Patemed Nov. 14, 1911. i

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UNITED clinton.

HOHER `il. HOTT, V`Gill' IETROIT, MICHIGAN.

ADJUSTABLE CHUCK OIG SPIDER.

To all whom it may concern:

Be it known that I, HOMER J. HOYT, a citizen of the United States, residing in the city of Detroit, State of Michigan, have invented certain new and useful Improvements in Adjustable Chucks or Spiders, of which the following is a full, clear, and complete disclosure.

My invention relates to universal or adjustable chucks or spidersl for holding and driving rings or other similar objects whose inner surfaces are circular or cylindrical.

My improved chuck is particularl adapted for use in connection with tireuilding machines in which the ring or mold, upon which the tire is formed and built up during the application of the rubber fabric, is rotatably supported while such fabric is being applied thereto and forced into the requisite shape of a tire under tension. In this type of machine the chuck is usually mounted at the end of a spindle or shaft which is uniformly rotated by power-driven means.

The object of my invention is to produce a chuck or spider in which the arms or projecting supports are made adjustable, and an adjustment permitted between reater limits in a radial direction than has eretofore been possible.

Briefly described, my invention comprises providing a suitable hub or casing through which the supporting arms pass, substantially on the chords of the circle forming the outer circumference of the casing. These arms are made adjustable by means hereafter to be described more in detail.

For a detailed description of one form of my invention'which I at present deem preferable, reference may be had to the following specification, and to the accompanying drawing forming a part thereof, in which:

Figure 1 is a vertical elevation of my 'improved chuck, part of the same being shown in section to disclose the arrangement of the supporting arms and the operating mechanism. Fig. 2 is a side elevation thereof, the upper half of the device being shown in vertical section on a diametrical line.

Referring to the drawing, the numeral 1 indicates a ring (shown in dotted and dash lines) which may be used as a support for a tire when the same is being built up, or may be any other similar device, and 2 indicates the casing or hub of the chuck which is preferably formed in two circular sections Specication of Letters Patent.

l Patente i Nov. 14, 1911. Application filed March 16, 1911. Serial No. 614,828. y

secured together by any suitable bolts, as. 4

indicated at 2.

The numeral 3 indicates the supporting arms for the chuck which pass through holes formed in the two halves of the casing, which holes are enlarg d at their central portions, hubs 5 of spiral gears l. V'Ihe arms 3 are screw-threaded for a considerable portion of their lengths within the casing 2, the inner surface `of the hubs 5 also being-screwthreaded to correspond therewith.' The spiral gears 6 being mounted transversely of the plane of the chuck, :re arranged so that their pitch lines cross th e same clrcle in the plane of the chuck, anc a spiral gear 7 is located in a recess in tha central portion of the chuck and meshes wi 2h each of the spiral gears 6. The gear 7 is j rovided with a central opening within which is keyed a shaft or stud 9 which is enlarg ed at its -outer edge, as indicated at 10, and p rovided with an angular recess adapted to receive an angular hub 11 of a crank 12. 'I he outer ends of the supporting arms 3 are provided with any suitable means for givil .g a firm hold upon the ring being support ed, and in this instance I have shown tvo of the arms provided with sharp-edged rollers 8 and a tapering end 8', all of weich are adapted to fit within a groove or small recess or recesses in the ring 1. lhe central portion as indicated a; 4, to receive the of the chuck on that ,wide opposite to the socket 10 contains an o] `ening which is interiorly screwthreaded, as indicated at 13. This opening is adapt ad to pass over the end of a suitable supporting and driving shaft which is also scre w-threaded to correspond thereto.

The operation of the levice will be obvious from the above des( ription. When the chuck is in position on the end of the driving shaft and it is desir :d to remove orplace a rlng in position, it is only necessary to insert the hub 11 of the c Tank 12 in the socket 10 and turn the same i1 such a direction `as will withdraw or eXtenl the arms 3. After this the ring may be 1 emoved and the tire building or other oper: tion proceeded with.

What I claim and de: ire to prot-ect by Letters Patent is :1M

1. A chuck or s idel, comprisin extensible screw-threade arl 1s having teir axes tangent to a common :ircle about the axis 2. A chuck or spider comprisingra suits able casing having holes eXtendin therethrough substantially on chords of t e circle of the outer circumference of the chuck, screw threaded arms located in said holes, interiorly screw threaded stops on said arms and means located centrally of said chuck and adapted to simultaneously rotate said stops to Withdraw or extend said arms.

3. A chuck or spider comprising, a suitable casing having holes passing therethrough on chords of the circle forming the outer circumference of said chuck, eXtensible arms located in said holes and having their inner portions screw-threaded, screwgears mounted on said arms Within said casing, and a central screw-gear meshing with Copies of this patent may be obtained for said first named screWi-gears and adapted to simultaneously rotate the latter.

,4.A chuck or spider comprising, a suitile casing having holes passing thereon chords of the circle forming the outer circumference of said chuck, screwthr` Y, yd arms located in said holes, internally hreaded screw-gears mounted on sald arms Within said casing, a central screw-gea; 30

meshing with the first named screw and located in the central plane of said chuck, a central shaft on which said central gear is fixed, and means for rotating said central gear Within said casing.

Signed at the city of Detroit, State of Michigan, this 13 day of March, 1911.

HOMER J. HoYT.

Witnesses:

VIVIAN L. STONE, F. E. SoHUL'rz.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

